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On the continuum limit of Landau gauge gluon and ghost propagators in SU(2) lattice gauge gluodynamics | | I. Bogolubsky
; E.-M. Ilgenfritz
; M. Müller-Preussker
; A. Sternbeck
; | | Date: |
14 Mar 2013 | | Abstract: | We continue the systematic computation of Landau gauge gluon and ghost
propagators of SU(2) gluodynamics using a sequence of increasing lattice sizes
L^4 up to L=112 with corresponding eta-values chosen to keep the linear
physical size a(eta)L ~ 9.6 fm fixed. To extremize the Landau gauge
functional we employ simulated annealing combined with subsequent
overrelaxation. Renormalizing the propagators at momentum mu= 2.2 GeV we
observe quite strong lattice artifacts for the gluon propagator as well as for
the ghost dressing function within the momentum region q < 1.0 GeV. The
dependence on the lattice spacing for the gluon propagator at lowest accessible
physical momentum values does not yet allow a simple extrapolation to the
continuum limit. On the contrary, the running coupling derived from the bare
dressing functions seems less affected by lattice artifacts. | | Source: | arXiv, 1303.3423 | | Services: | Forum | Review | PDF | Favorites | |
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